Efficient windows do more than cut energy costs – they also make homes more comfortable. In cold climates, one of the ways they do that is by reducing the amount of condensation on the inside of windows. Condensation forms when a window’s interior surface temperature is colder than the air inside. It can lead to mold and mildew inside a house and block views.
When selecting windows for cold climates, it is important to consider the Condensation Resistance Rating, an optional rating found on the NFRC label affixed to new windows that have been certified by NFRC. A higher rating leads to less condensation on a scale of 1-100. In a colder climate, a much higher rating is appropriate compared with what is required in a warmer climate. Click for more about this rating.